If you take out your front driveshaft on a 1998 5.0 AWD Explorer, it will not stay put in park.I had my driveshaft go bad. I was too cheap to buy a new genuine Ford driveshaft. I decided I dont need all wheel drive in Florida.One day the wife noticed the Explorer had backed itself half way out to the street.The parking propertys are 65 % to 35 %. The front driveshaft controls 35 % of your parking.I have found a used one to remedy my problem. Weird huh ?